# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000         0.0146015        0.00236197    
     0.460000          0.700000         0.0146492        0.00222193    
     0.700000           1.00000        0.00861911        0.00297626    
      1.00000           1.54000        0.00673923        0.00289590    
      1.54000           2.40000        0.00280181        0.00428174    
      2.40000           4.80000        0.00822880        0.00399873    
      4.80000           10.0000        0.00998221        0.00591744